CN218465721U - N-butane sulfur reduction device - Google Patents
N-butane sulfur reduction device Download PDFInfo
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- CN218465721U CN218465721U CN202222313662.7U CN202222313662U CN218465721U CN 218465721 U CN218465721 U CN 218465721U CN 202222313662 U CN202222313662 U CN 202222313662U CN 218465721 U CN218465721 U CN 218465721U
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Abstract
The utility model provides a normal butane sulphur reduction device belongs to the technical field of normal butane preparation technology, including raw materials storage tank, hydrogenation module, desulfurization module includes deisobutanizer, digester, is equipped with the desulfurizer in the digester, and the export of raw materials storage tank is connected with the feed inlet of hydrogenation module, and the export of hydrogenation module is connected with the feed inlet of deisobutanizer, and the export at the bottom of the tower of deisobutanizer is connected with the tank deck entry of digester, compares prior art and carries out the position transform with the digester, makes the quantity of desulfurizer reduce on the one hand, has reduced the cost; on the other hand, isobutane and C are separated in a deisobutanizer 1 ‑C 3 When the components are used, the hydrogenation module is converted into the components of inorganic sulfur and is also separated, so that the utilization rate of the deisobutanizer is improved, the sulfur content in the normal butane discharged from the deisobutanizer is greatly reduced, and the use load of a desulfurizing tank is reduced.
Description
Technical Field
The utility model relates to a normal butane preparation technology technical field, concretely relates to normal butane sulphur reduction device.
Background
N-butane is an important organic chemical raw material, and is used as a subcritical biotechnology extraction solvent, a refrigerant and an organic synthetic raw material besides being directly used as a fuel. Butane is dehydrogenated in the presence of a catalyst to generate butene or butadiene, the butene or butadiene is isomerized into isobutane in the presence of sulfuric acid or anhydrous hydrofluoric acid, isobutane is catalytically dehydrogenated to generate isobutene, and the isobutane can be used as a alkylating agent to react with olefin to generate branched-chain hydrocarbon with good anti-knock performance. The butane can be made into maleic anhydride, acetic acid, acetaldehyde, etc. by catalytic oxidation; halogenated butane can be prepared by halogenation; nitrobutane can be obtained by nitration; catalyzing at high temperature to prepare carbon disulfide; hydrogen can be prepared by steam conversion.
At present, the normal butane is obtained by a separation method by taking carbon four-fraction of a refinery as a raw material. For example, a Chinese invention patent with the application number of 201810379649.7 discloses a method for preparing n-butane from mixed carbon four, and particularly discloses a method for preparing n-butane from by-product carbon four generated in the production processes of preparing ethylene from petroleum refining and steam cracking, preparing olefin from methanol and the like, which comprises the steps of putting the by-product carbon four into a fixed bed reactor, adding a hydrogenation catalyst into the reactor, circularly introducing hydrogen for hydrogenation reaction, fully contacting with a desulfurizing agent for desulfurization, sending the desulfurized product into a rectifying tower, collecting propane and isobutane at the top of the rectifying tower, and collecting n-butane at the bottom of the rectifying tower; the invention uses the desulfurizer to desulfurize after hydrogenation reaction, which makes the desulfurizer use large.
Disclosure of Invention
In view of this, the utility model provides a can reduce normal butane of desulfurizer quantity and fall sulphur device.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a normal butane sulphur reduction device, includes raw materials storage tank, hydrogenation module, desulfurization module, the desulfurization module includes deisobutanizer, digester, be equipped with the desulfurizer in the digester, the export of raw materials storage tank with the feed inlet of hydrogenation module is connected, the export of hydrogenation module with the feed inlet of deisobutanizer is connected, the export at the bottom of the tower of deisobutanizer with the tank deck entry linkage of digester to carry out the desulfurization earlier through the deisobutanizer, the desulfurization is carried out to the reuse digester.
Preferably, the desulfurization module further comprises a reflux tank, a desulfurization pipe is arranged on the reflux tank, an inlet of the reflux tank is connected with an outlet at the top of the deisobutanizer, an outlet of the reflux tank is connected with an inlet at the side part of the deisobutanizer, and a gas outlet of the reflux tank is connected with an inlet of the desulfurization pipe.
Preferably, the desulfurization module further comprises a gas pipe network, and an outlet of the desulfurization pipe is connected with an inlet of the gas pipe network.
Preferably, a normal butane outlet pipe is arranged at the bottom of the desulfurization tank and is connected with an outlet at the bottom of the desulfurization tank.
Preferably, the hydrogenation module comprises a hydrogenation reactor and a hydrogen inlet pipe, a gas inlet of the hydrogenation reactor is connected with the hydrogen inlet pipe, a feed inlet of the hydrogenation module is connected with an outlet of the raw material storage tank, and a bottom outlet of the hydrogenation reactor is connected with a feed inlet of the deisobutanizer.
Preferably, the hydrogenation module further comprises a circulating pipe, an inlet of the circulating pipe is connected with a side outlet of the hydrogenation reactor, and an outlet of the circulating pipe is connected with a side inlet of the hydrogenation reactor.
Preferably, the hydrogenation module further comprises an exhaust pipe, one end of the exhaust pipe is connected with the circulating pipe, and the other end of the exhaust pipe is connected with an inlet of the gas pipe network.
Preferably, a second valve is arranged on the exhaust pipe.
Compared with the prior art, the beneficial effects of the utility model reside in that:
when raw materials enter a hydrogenation module from a raw material storage tank, unsaturated hydrocarbons in the raw materials are subjected to addition reaction to generate saturated alkane through hydrogenation, organic sulfur in the raw materials is converted into inorganic sulfur, the inorganic sulfur and the saturated alkane enter a deisobutanizer together, and isobutane, inorganic sulfur and C are separated in the deisobutanizer 1 -C 3 Separating the components from the top of the deisobutanizer, allowing n-butane and a small part of sulfur to enter the desulfurizing tank, and adsorbing and removing the sulfur by a desulfurizing agent to ensure that the sulfur content in the n-butane is lower than 0.5ppm; compared with the prior art that the position of the desulfurizing tank is changed, on one hand, the consumption of the desulfurizing agent is reduced, and the cost is reduced; on the other hand, the service life of the desulfurizing tank is prolonged; in yet another aspect, isobutane, C are separated in a deisobutanizer 1 -C 3 When the components are used, the hydrogenation module is converted into the components of inorganic sulfur and is also separated, so that the utilization rate of the deisobutanizer is improved, the sulfur content in the normal butane discharged from the deisobutanizer is greatly reduced, and the use load of a desulfurizing tank is reduced.
Drawings
FIG. 1 is a process flow diagram of the n-butane sulfur reduction device.
In the figure: the device comprises a normal butane sulfur reduction device 10, a raw material storage tank 100, a hydrogenation module 200, a hydrogenation reactor 210, a hydrogen inlet pipe 220, a second valve 221, a circulating pipe 230, an exhaust pipe 240, a first valve 241, a desulfurization module 300, a deisobutanizer 310, a desulfurization tank 320, a normal butane outlet pipe 322, a reflux tank 330, a desulfurization pipe 331 and a gas pipe network 340.
Detailed Description
The following combines the utility model discloses a figure is right the technical scheme and the technological effect of the embodiment of the utility model are further elaborated.
Referring to fig. 1, a normal butane sulfur reduction device 10 includes a raw material storage tank 100, a hydrogenation module 200, and a desulfurization module 300, wherein the desulfurization module 300 includes a deisobutanizer 310 and a desulfurization tank 320, a desulfurizing agent is installed in the desulfurization tank 320, an outlet of the raw material storage tank 100 is connected with a feed inlet of the hydrogenation module 200, an outlet of the hydrogenation module 200 is connected with a feed inlet of the deisobutanizer 310, and a bottom outlet of the deisobutanizer 310 is connected with a top inlet of the desulfurization tank 320, so as to firstly perform desulfurization through the deisobutanizer 310 and then perform desulfurization through the desulfurization tank 320.
Compared with the prior art, the beneficial effects of the utility model reside in that:
when raw materials are mixedThe raw material enters the hydrogenation module 200 from the raw material storage tank 100, unsaturated hydrocarbons in the raw material undergo an addition reaction to generate saturated alkane through hydrogenation, organic sulfur in the raw material is converted into inorganic sulfur, the inorganic sulfur and the saturated alkane enter the deisobutanizer 310 together, and isobutane, inorganic sulfur and C are separated in the deisobutanizer 310 1 -C 3 The components are separated from the top of the deisobutanizer 310, n-butane and a small part of sulfur enter the desulfurizing tank 320, and the sulfur is absorbed and removed through a desulfurizing agent, so that the sulfur content in the n-butane is lower than 0.5ppm; compared with the prior art that the position of the desulfurizing tank 320 is changed, on one hand, the consumption of the desulfurizing agent is reduced, and the cost is reduced; on the other hand, the service life of the desulfurization tank 320 is prolonged; in yet another aspect, isobutane, C are separated in the deisobutanizer 310 1 -C 3 During the components, the hydrogenation module 200 is converted into inorganic sulfur components and is also separated, so that the utilization rate of the deisobutanizer 310 is improved, the sulfur content in the normal butane discharged from the deisobutanizer 310 is greatly reduced, and the use load of the desulfurizing tank 320 is reduced.
Further, the desulfurization module 300 further comprises a reflux tank 330, a desulfurization pipe 331 is arranged on the reflux tank 330, an inlet of the reflux tank 330 is connected with an outlet at the top of the deisobutanizer 310, an outlet of the reflux tank 330 is connected with an inlet at the side of the deisobutanizer 310, and a gas outlet of the reflux tank 330 is connected with an inlet of the desulfurization pipe 331; when the saturated alkane from the hydrogenation module 200 enters the deisobutanizer 310, the saturated alkane is heated and vaporized only and enters the reflux tank 330, and after condensation reflux, isobutane, inorganic sulfur and C are condensed and refluxed 1 -C 3 And the components are discharged from the desulfurization pipe 331, one part of isobutane returns to the deisobutanizer 310 again, the other part of isobutane is extracted as a product, and n-butane flows out from the bottom of the deisobutanizer 310 to the desulfurization tank 320 for continuous desulfurization.
Further, the desulfurization module 300 further includes a gas pipe network 340, an outlet of the desulfurization pipe 331 is connected to an inlet of the gas pipe network 340, and isobutane, inorganic sulfur and C separated by the deisobutanizer 310 1 -C 3 ComponentsAnd enters the gas pipe network 340 for removal.
Further, a normal butane outlet pipe 322 is arranged at the bottom of the desulfurization tank 320, the normal butane outlet pipe 322 is connected with an outlet at the bottom of the desulfurization tank 320, a small amount of sulfur may be contained in normal butane discharged from the bottom of the deisobutanizer 310, and the sulfur is adsorbed by a desulfurizing agent in the desulfurization tank 320, so that the purity of the normal butane is improved.
Further, the hydrogenation module 200 includes a hydrogenation reactor 210 and a hydrogen inlet pipe 220, a second valve 221 is arranged on the hydrogen inlet pipe 220, a gas inlet of the hydrogenation reactor 210 is connected with the hydrogen inlet pipe 220, a feed inlet of the hydrogenation module 200 is connected with an outlet of the raw material storage tank 100, a bottom outlet of the hydrogenation reactor 210 is connected with a feed inlet of the deisobutanizer 310, after the raw material in the raw material storage tank 100 enters the hydrogenation reactor 210, the second valve 221 is opened, the hydrogen enters the hydrogenation reactor 210, an addition reaction is performed in the hydrogenation reactor 210, unsaturated alkane is converted into saturated alkane, and organic sulfur doped in the raw material is converted into inorganic sulfur.
Further, the hydrogenation module 200 further comprises a circulation pipe 230, an inlet of the circulation pipe 230 is connected to a side outlet of the hydrogenation reactor 210, and an outlet of the circulation pipe 230 is connected to a side inlet of the hydrogenation reactor 210, so that unsaturated hydrocarbons are sufficiently contacted with hydrogen to generate saturated alkanes, and only saturated alkanes entering the deisobutanizer 310 are generated.
Further, the hydrogenation module 200 further comprises an exhaust pipe 240, one end of the exhaust pipe 240 is connected to the circulation pipe 230, the other end of the exhaust pipe 240 is connected to an inlet of the gas pipe network 340, hydrogen is continuously consumed in the process of converting unsaturated hydrocarbons into saturated alkanes and organic sulfur into inorganic sulfur, and when the purity of hydrogen in the hydrogenation reactor 210 reaches below 60%, the first valve 241 is opened, and waste gas and impure hydrogen in the hydrogenation reactor 210 are discharged to the gas pipe network 340 through the exhaust pipe 240.
Further, a first valve 241 is arranged on the exhaust pipe 240, and after the gas in the hydrogenation reactor 210 is exhausted, the first valve 241 is closed, the second valve 221 is opened, hydrogen is introduced, and the hydrogenation reaction is continued, so that the olefin reaction is more thorough.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. The n-butane sulfur reduction device is characterized by comprising a raw material storage tank, a hydrogenation module and a desulfurization module, wherein the desulfurization module comprises an deisobutanizer and a desulfurization tank, a desulfurizing agent is filled in the desulfurization tank, an outlet of the raw material storage tank is connected with a feed inlet of the hydrogenation module, an outlet of the hydrogenation module is connected with a feed inlet of the deisobutanizer, and a tower bottom outlet of the deisobutanizer is connected with a tank top inlet of the desulfurization tank.
2. The n-butane sulfur reduction device according to claim 1, wherein the desulfurization module further comprises a reflux tank, a desulfurization pipe is arranged on the reflux tank, an inlet of the reflux tank is connected with an outlet at the top of the deisobutanizer, an outlet of the reflux tank is connected with an inlet at the side of the deisobutanizer, and a gas outlet of the reflux tank is connected with an inlet of the desulfurization pipe.
3. The n-butane sulfur reduction device of claim 2, wherein the desulfurization module further comprises a gas pipe network, and an outlet of the desulfurization pipe is connected to an inlet of the gas pipe network.
4. The n-butane sulfur reduction device of claim 1, wherein an n-butane outlet pipe is provided at the bottom of the desulfurization tank, and the n-butane outlet pipe is connected to a tank bottom outlet of the desulfurization tank.
5. The n-butane sulfur reduction device according to claim 3, wherein the hydrogenation module comprises a hydrogenation reactor and a hydrogen inlet pipe, a gas inlet of the hydrogenation reactor is connected with the hydrogen inlet pipe, a feed inlet of the hydrogenation module is connected with an outlet of the raw material storage tank, and a bottom outlet of the hydrogenation reactor is connected with a feed inlet of the deisobutanizer.
6. The n-butane sulfur reduction device according to claim 5, wherein the hydrogenation module further comprises a circulation pipe, an inlet of the circulation pipe is connected with a side outlet of the hydrogenation reactor, and an outlet of the circulation pipe is connected with a side inlet of the hydrogenation reactor.
7. The n-butane sulfur reduction device of claim 6, wherein the hydrogenation module further comprises an exhaust pipe, one end of the exhaust pipe is connected with the circulation pipe, and the other end of the exhaust pipe is connected with an inlet of the gas pipe network.
8. The n-butane sulfur reduction device of claim 7, wherein a first valve is disposed on the vent line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222313662.7U CN218465721U (en) | 2022-08-31 | 2022-08-31 | N-butane sulfur reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222313662.7U CN218465721U (en) | 2022-08-31 | 2022-08-31 | N-butane sulfur reduction device |
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| Publication Number | Publication Date |
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| CN218465721U true CN218465721U (en) | 2023-02-10 |
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| CN202222313662.7U Active CN218465721U (en) | 2022-08-31 | 2022-08-31 | N-butane sulfur reduction device |
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| CN (1) | CN218465721U (en) |
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